Stop-motion device for looms.



P. P. C. KREMERS.

STOP MOTION DEVICE FOR LOOMS.

APPLICATION FILED NOV. 19. 19w

L29%,2, Patented Feb. 18, 1.91%

2 SHEEIS SHEET l.

jiwfinimv W HILL C3 z/Qawm P. P. C. KREMERS.

STOP MOTION DEVICE FOR LOOMSJ APPLICATION FIUZD NOV. 19. 1917 1,29% 482.Patented Feb. 15%, mm.

2 SHEETS-SHEET 2. J fig. ,8,

sans annier PETER PAUL C. KREMERS, F PHILADELPHIA, PENNSYLVANIA,ASSIGNOE TG JOHN AND JAMES DOBSON, INCORPORATED, 0F PHILADELPHIA,PENNSYLVANIA, A.

POBATION OF PENNSYLVANIA.

STOP-MOTION DEVICE FOR LOOMS.

aaeaaea.

Specification of Letters Patent.

'Patented. Feb. 15?,

Application filed November 19, 1917. Serial No. 202,695.

To all whom it may concern:

Be it known that 1, PETER PAUL C. Knmrnas, a subject of the Emperor ofGermany, residing in the city of Philadel hia, county of Philadelphia,and State of ennsylvania, have invented certain new and usefulImprovements in Stop-Motion Devices for Looms, of which the following isa specification, reference being had to the accompanying drawings,forming a part thereof.

The object of my invention is to provide a novel, simple and efiicientstop motion device for looms, wherein a signal will be automaticallyactuated through an electric connection upon the breaking of any one ofthe warp threads associated therewith, and

the actuation of the signal will subsequently be automatically stoppedwhen the starting and stopping lever of the loom is shifted into thestopping position; so that, upon the breaking of a warp thread, thesignal will be actuated to notify the operative, who will then stop theloom by shifting the said lever and thereby automatically stop theactuation of the signal; I

With the above and related objects in view, my invention consists in thenovel construction and combinations of parts hereinafter described andclaimed.

In the accompanying drawings, illustrating my invention:

Figure 1 is a vertical section of suilicient of a loom embodying myinvention to illustrate the same.

Fig. 2 is a longitudinal section of the tubular contact part showing thecontact members therein. Y

hig. 3 is a top view of the parts shown in Fig. 2.

Fig. 4: is a view showing the warp-controlled contact making andbreaking devices in section, the starting and stopping lever, thesignaling device and the electric circuit diagrammatically.

Referring to the drawings, 2 designates the loom frame, 3 the breastbeam, 4 the lay, 5 the harness, 6 the pile warp'threads, 6 the backingwarp threads, 7 and 8 the rolls from which thewarp threads are drawn, 9the take up roller for the woven fabric, and 10 the starting andstopping lever which controls the loom mechanism and which is adapted tobe moved to the position shown by full lines in Fig. 4: to start theoperation of the loom and to be moved to the position shown by dottedlines in Big; 1 to stopthe operation of the loom. lhe construction andoperation of the parts thus far described are common and well known topersons skilled in this art. 7

When the loom is in motion, the lever 10 is in the full line positionand rests against a contact arm 11 which is supported on the frame 2 andelectrically insulated therefrom; and, When the lever 10 is moved to thedotted line position to stop the loom, the lever 10 is moved out ofcontact with the arm 11, for a purpose hereinafter er:-

plained.

Certain of the warp threads 6, and, if desired, all of them, are drawnover and supported and guided by a metal contact part 12 which ispreferably made tubular in form, as illustrated. The tubular contactpart12 extends transversely of the warp threads 6 beneath those supportedthereby, and it is connected at its respective ends to rods 13 which areconnected by wires 14.

to springs 15 carried by arms 16 which pro- 0 ject from a shaft 17 onthe loom frame 2 to yieldingly support the tubular part 12. it will, ofcourse, be understood that the part 12 may be supported in anyconvenient manner.

Extending centrally through the tubular part 12 is a metal rod 18 havingits ends supported in blocks or heads 19 which are tact part or tube 12for a purpose presently appearing.

Pivotally mounted on the rod 18 and located within the tube 12 is aseries or" independently movable Contact members 22 which correspond innumber with the warp threads 6 which are to control the stop mo tionsignal hereinafter described. These cont-act members 22 are formed ofthin sheet metal, and they extend outwardly from within the tube 12through a longitudinal slot formed therein. The outer or free ends ofthe members 22 are provided with heads 24 having holes or openings 25therein through which their warp threads 6 extend,

as clearly shown in the drawings. Normally the contact members 22 aresuspended by their warp threads 6 in spaced relation to the upper andlower walls of the slot 28, as shown ,by full lines in Fig. 4, and, whenwarp thread breaks, its contact member 22 is thereby permitted "to dropdown to the dotted line position shown in Fig. 4, in which it rests uponand makes electrical contact with the tube 12; To prevent the members 22from accidentally making contact with the upper wall of the slot 23, llprovide the tube 12 with a protecting strip 28 of leather or othersuitable insulating, material, as shown in Fig. 4:.

The lever 10 and tubular contact part 12 are electrically connected bythe loom frame 2, shaft 17, arm 16, spring 15, wire 14 and rod 13, andthis connection is indicated by a wire 27 in Fig. 4. Leading from therod 18 to an electric signal 28, in the present instance a bell, is awire 29, and leading from the signal 28 to a battery 30 is a wire 31.Leading from the battery 30 to the contact arm 11 is a wire 32,thuscompleting an electric circuit in which the signal 28 is located andwhich is normally open between the contact members 22 and the tubularcontact part 12, as clearly shown in Fig. 4, and which may be opened andclosed at another point, between the lever 10 and conarm 11, by shiftingthe lever 10, as previously explained. The signal 28 may be supported onthe loom frame 2 or in any desired locality.

When the loom is in motion, the lever 10 is in the position shown byfull lines in iand the members 22 are held by their were L threads 6 inthe position shown by full lines in Fig. t. When, now, during theweaving operation, one of the warp threads 6, supporting the contactmembers 22, breaks, the member 22 supported thereby will drop downto thedotted line position and make electrical contact with the tubularcontact part 12, and thereby close the electric circuit and actuate thesignal 28, and thus convey to the loom attendant the information that awarp thread has broken. The attendant then shifts the lever 10 to thedotted line position, and thus stops the loom; and this operationautomatically opens the electric circuit between the lever 10 and thearm 11 and stops the operation of the signal. This done, the attendantrepairs the broken warp thread, which then again supports its contactmember 22 in the full line position; and, thereafter, the attendantshifts the lever 10 into the full line position and into, 0011- aeeaesatact with the arm 11, thus the learn and closing the circuit between thelove and arm 11, and leaving the parts i' the line position tor asucceeding opera upon the brea-klng of another wa; tlrea ;threads, acontact part on said means, a movable contact member for each threadmovably supported by and insulated from said means, each member beingnormally held by its thread in a position out or contact with said partand automatically movable upon the breaking of said thread into contactwith said part, an electric circuit including said part and said membersand normally open between them, and a signaling device in said circuitand operated therebywh'en the circuit is closed; a manually operativeshipper lever in said electrical ci cuit, and a contact arm in saidcircuit said lever operative to engage said arm to close circuit whenoperated to start 1 e and to open said circuit when operated to stopthe, loom.

2.111 a loom, the combination of m-ans for supporting and guiding aseries of warp threads, acontact part on said means, series ofindependently-movable, contact members pivotally supported by saidmeans, one member for each thread, each member being normally held byits thread out of contact with said part and being automatically movableupon the breaking" or" sai. read into contact with said part, anelectric circuit in eluding said part and said members and normally openbet veen them, 1 device in said circuit operated thereby when thecircuit is closed; a manm! e erative shipper lever insaid el ctricalcuit, and a contact in said circuit and said lever operative toengage'said arm to close said circuit when operated to the loom and toopen said circuit when operated to stop the loom.

3. In a loom, the combination of for supporting and guiding a series orwarp threads, a contact part on means, a movable contact member for eachthread pivotally supported by said means, each member having an openingfor confining its thread therein, and each member being nornially heldby its thread out or" contact with said part and being automaticallymovable upon the breaking of said thread into contact with said part. anelectric circuit including said part and said members and normally openbetween them, and a Sig? ling; devic in said circuit and operatedtere-by when the circuit is closed. a manually operative shipper leverin said electrical circuit, and a contact arm in said circuit and saidlever operative to engage said arm clo 3 said circuit when operated tostart the loom and to open said circuit when operated to stop the loom.

4c. In a loom, the combination of means for supporting and guidingaseries of warp threads, a contact, part on said means, a rod secured toand insulated from said means, a series of independently-movable contactmembers pivoted on said rod and electrically connected thereto, onemember for each thread, each member being normally held by its threadout of contact with said part and being automatically movable upon thebreaking of said thread into contact with said part, an electric circuitincluding said rod and said members and said part and being normallyopen between said members and said part, a signaling device in saidcircuit and operated thereby when the circuit is closed; a manuallyoperative shipper lever in said electrical circuit, and a contact arm insaid circuit and said lever operative to engage said arm to close saidcircuit when operated to start the loom and to open said circuit whenoperated to stop the loom.

5. In a loom, the combination of means for supporting and guiding aseries of warp threads, including a contact element, a rod upon whichsaid element is mounted and insulated therefrom, a series of movablecontact members electrically connected and independently pivoted on saidrod, each of said movable members having an opening through which a warpthread passes, and each member bein normally maintained by its threadout of e ectrical contact with said contact element and operating, uponthe breaking of its contained thread, to automatically contact with saidelement, an electric circuit normally open and comprising said rod andsaid movable members and said contact element, a signaling device insaid circuit and operated thereby when the circuit is closed; and meanscomprising a contact arm in said circuit and a shipper lever operativeto engage said arm to close the circuit when starting the operation ofthe loom and to open said circuit when the actuation of the loom isstopped.

6. In a loom, the combination of means for supporting and guiding aseries of warp threads, said means including a tubular contact parthaving a longitudinal slot therein and over which said threads extend, arod extending longitudinally through said part and electricallyinsulated therefrom, a series of independently movable contact memberspivoted on said rod and electrically connected thereto and extendingoutwardly through said slot, one member for each thread, each memberbeing normally held by its thread out of contact with said art and beingautomatically movable upon t e breaking of said thread into contact withsaid part upon the breaking of its thread, an electric circuit includingsaid rod and said members and said part and being normally open betweensaid members and said part, and a signaling device in said circuit andoperated thereby when the circuit is closed.

7.. In a loom, the combination or means for supporting and guiding aseries of warp threads, said means including a tubular contact parthaving a longitudinal slot therein and over which said threads extend, arod extending longitudinally through said part and electricallyinsulated therefrom, a series of independently movable contact memberspivoted on said rod and electrically connected thereto and extendingoutwardly through said slot, one member for each thread, the outwardlyextending end of each member having an opening for confining its threadtherein, each member being normally held by its thread out of contactwith said part and being automatically movable upon the breaking of saidthread into contact with said part, an electric circuit including saidrod and said members and said part and being normally open between saidmembers and said part, and a signaling device in said circuit andoperated thereby when the circuit is closed.

8. In a loom, the combination of means for supporting and guiding aseries of warp threads, said means including a tubular con tact parthaving a longitudinal slot therein and over which said threads extend, arod extending longitudinally through said part and electricallyinsulated therefrom, a series of independently movable contact memberspivoted on said rod and electrically connected thereto and extendingoutwardly through said slot, one member "for each thread, each memberbeing normally held by its thread away from one wall of said slot andbeing automatically movable upon -the breaking of said thread intocontact with said wall to make electrical contact with said part, and astrip of insulating material adjacent to the opposite wall of said slotand preventing said members from making electrical contact therewith, anelectric circuit including said rod and said members and said part andbeing normally open between said members and said part, and a signalingdevice in said circuit and operated thereby when the circuit is closed.

9. In a loom, the combination of a supporting frame, a contact armsecured thereto and insulated therefrom, a manually operative startingand stopping lever electrically insulated from said arm and movable tostarting and stopping positions in alternate succession to start andstop the operation of the loom, said lever making contact with said armwhen moved to its starting position and breaking such contact when movedto its stopping position, n electric circuit including said arm and saidlever and being adapted to be broken by the movement of said unit beingnormally open at a certain point, thereby operated until the manueimezins controlled by the breaking of a Warp of said lever to itsstopping peer 1 thread. to close said circuit at said point, and Saidcircuit between said sei'cl. lever.

a signaling device in said circuit and oper- In Witness whereof, Iheve eated thereby when the circuit is closed my hand this 12th day 01 Never;why when the loom is in motion said warp thread breaks said ciieuih willbe A -Uri lever from Contact with said arm, said circlosed at said pointand said simiel will.

